TW201510809A - Touch sensor - Google Patents

Abstract

Disclosed herein is a touch sensor including: a window substrate; and bezel layers formed along an outer circumference on the window substrate, wherein the bezel layer contains a photochromic compound or a thermochromic compound expressing at least two colors. According to the present invention, a photochromic compound or a thermochromic compound may be applied to a bezel layer of the touch sensor, thereby making it possible to implement various colors of the bezel layer according to external stimulation.

Description

Touch sensor

The invention relates to a touch sensor.

According to the development of computers using digital technology, the equipment supporting the computer has also been developed. Personal computers, portable transmitters, and other personal information processors use a variety of input devices, such as keyboards and mice, to perform text and graphics processing.

However, according to the rapid development of information-oriented society, the use of computers has been gradually expanded, and it may be difficult to efficiently operate products using only keyboards and mice that are currently functioning as input devices. Therefore, the demand for a device that is simple, has the fewest faults, and can easily input information has increased.

In addition, the current technology for input devices has surpassed the level of general functionality and has evolved toward technologies that are highly reliable, durable, innovative, design, and manufactured. To this end, touch sensors have been developed as input devices capable of inputting information such as text and pictures.

The touch sensor is mounted on a display surface of an image display device, such as an electronic organizer, a flat panel display device or a cathode ray tube (CRT), and the flat panel display device includes a liquid crystal display. (Liquid Crystal Display, LCD), Plasma Display Panel (PDP), electroluminescence (El) component or the like, so that the user can select the desired information when viewing the image display device.

The touch sensor is divided into a resistive touch sensor, a capacitive touch sensor, an electromagnetic touch sensor, a Surface Acoustic Wave (SAW) type touch sensor, and an infrared touch sensor. Considering signal amplification problems, differences in resolution, difficulty in design and manufacturing techniques, optical properties, electrical properties, mechanical properties, resistance to the environment, input characteristics, durability, and economic benefits, These various forms of touch sensors as described above are suitable for use in electronic products. In particular, current resistive touch sensors and capacitive touch sensors have been commonly used.

As an example of the touch sensor, a structure can be provided. A transparent substrate and an inductive component of the structure are bonded to each other by using an adhesive as a medium, and a frame member formed along an edge of the transparent substrate can cover the sensing. The busbar of the component.

Recently, the external design of information technology devices has become more and more important, and the display screen has become larger. In order to manufacture a large display screen without increasing the external dimensions of the device, and to achieve full color (the full color is close to the color of the real object), the area of the frame member is narrowed compared to the existing frame member. The demand is gradually increasing.

According to the prior art, the patent document shown below discloses a bezel member comprising a black layer and an indium tin oxide (Indium). Tin Oxide, ITO).

Recently, in addition to attempts to make different colors for the bezel components of touch sensors, many efforts have been made to reduce the thickness of devices, including touch sensors. In particular, in order to reduce the penetration of light, the thickness of the brightly colored frame member is increased, so that the product also has a thick thickness. In addition, since a thin bezel member may cause a problem of bonding with the touch panel, and since other bezel members simply express an aesthetic feeling, it may be difficult to manufacture a product that can satisfy the yield of the related product or various tastes of the user. .

[Prior technology]

[Patent Document]

Patent Document 1: KR2011-0053940 A.

The present invention is directed to providing a touch sensor in which a frame layer of the touch sensor has a color change of two or more colors, and the frame layer of the touch sensor is generated according to external stimulation, heat, or according to Any changes produced by other external environments sensed to display various colors enable the touch sensor to be operated stably and reliably.

According to a first preferred embodiment of the present invention, a touch sensor includes: a window substrate and a bezel layer. The frame layer is formed along a periphery, and the periphery is located on the window substrate, wherein the frame layer comprises a photochromic compound or a thermochromic compound, a photochromic compound or a thermal The color changing compound shows at least 2 colors.

The photochromic compound may be selected from the group consisting of triarylmethane, stilbene, azastilbene, nitrone, fulgide, spiropyran. At least one of a group consisting of (spiropyran), naphthopyran, spiro-naphthoxazine, and spiro-oxazine.

The photochromic compound can be optionally freed from {Spiro(2H-2,3-(3H)naphthalene(2,1-b)(1,4)oxazine)-1,3-dihydro-1,3,3-tri Methyl-6'-(1-piperidinyl)}({spiro(2H-2,3-(3H)naphtha(2,1-b)(1,4)oxazine)-1,3-dihydro-1 ,3,3-trimethyl-6'-(1-piperidinyl)}), {1,3-dihydro-1,3,3-trimethyl-6'-(2,3-dihydro-1H-indole哚-1-yl) snail [2H-吲哚-2,8'-[3H]naphtho[2,1-b][1,4]oxazine}({1,3-dihydro-1,3, 3-trimethyl-6'-(2,3-dihydro-1H-indole-1-y1)spiro[2H-indole-2,8'-[3H]naphto[2,1-b][1,4]oxazine }), and {3,3-diphenyl-3H-naphtho(2,1-b)pyran} ({3,3-diphenyl-3H-naphto(2,1-b)pyran}) At least one of the groups.

The bezel layer can be formed by mixing a photochromic compound or a thermochromic compound in a titania (TiO ₂ ) paste.

The bezel layer may comprise from 10 weight percent (wt%) to 70 weight percent of the photochromic compound or thermochromic compound, and from 30 weight percent to 90 weight percent of the titanium dioxide (TiO ₂ ) cement, photochromic compound or thermal The color changing compound is in a gel form.

The bezel layer may comprise from 30% by weight to 50% by weight of the photochromic compound or thermochromic compound, and from 50% by weight to 70% by weight of the titanium dioxide (TiO ₂ ) dope, the photochromic compound or the thermochromic compound is In the form of a glue.

When the photochromic compound is exposed to visible light, infrared light, or ultraviolet light, the photochromic compound may have a color change due to a change in the chemical structure of the photochromic compound.

The thermochromic compound is externally applied with heat, and the thermochromic compound may have a color change due to a change in the chemical structure of the thermochromic compound.

The thermochromic compound may be selected from the group consisting of spirolactone, fluoran, spiropyran, fulgide, bisphenol A, paraben (paraben). At least one of the group consisting of 1,2,3-triazol derivate, and 4-hydroxycoumarin.

The thermochromic compound comprises an electron donating compound and an electron accepting compound.

The electron donating compound may be selected from 3,6-dimethoxyfluorane, 3-cyclohexylamino-6-chlorofluorane, 3-diethyl 3-diethylaminobenfluorane, rhodamine B lactone, crystal violet lactone, 3-diethylamino-7-diphenyl Among the groups consisting of 3-diethylamino-7-dibenzylaminofluorane and 3-diethylamino-6-methyl-aminofluorane at least one. Further, the electron-accepting compound may be selected from N-octyl alcohol, N-decyl alcohol, N-lauryl alcohol, and N-myristyl alcohol. At least one of the group consisting of N-cetyl alcohol and N-stearyl alcohol.

The thermochromic compound may have the shape of a microcapsule having a diameter of from 1 micrometer to 50 micrometers.

The microcapsules may have a diameter of from 3 microns to 15 microns.

The electron donating compound and the electron accepting compound may be provided in an inner portion of a microcapsule, and an outer portion of the microcapsule may be covered by a thermosetting resin.

The thermosetting resin may be selected from the group consisting of a polyester resin, a polyurethane resin, a melamine resin, an epoxy resin, a diallyl phthalate resin, and At least one of vinylester resins.

The touch sensor may further include: an electrode pattern and an electrode wiring. The electrode patterns are formed between the frame layers, and the electrode patterns are formed on the window substrate to identify a user's touch coordinates. The electrode wiring is formed on the frame layer to be electrically connected to the electrode pattern.

In conjunction with the drawings, a detailed description will be made from the following detailed description. The above and other objects, features and advantages of the present invention are solved, wherein:

10‧‧‧Window type substrate

10a‧‧‧Base substrate

20‧‧‧Border layer

30‧‧‧electrode pattern

30a‧‧‧Electrical wiring

31‧‧‧First electrode pattern

31a‧‧‧First electrode wiring

32‧‧‧Second electrode pattern

32a‧‧‧Second electrode wiring

40‧‧‧Transparent adhesive layer

A, B, C‧‧‧ compounds

1 is a cross-sectional view of a touch sensor including a window type substrate in accordance with a preferred embodiment of the present invention.

2 is a cross-sectional view of a touch sensor in accordance with a preferred embodiment of the present invention.

3 is a cross-sectional view of a touch sensor in accordance with another preferred embodiment of the present invention.

4 is a cross-sectional view of a touch sensor in accordance with still another preferred embodiment of the present invention.

Figures 5 and 6 illustrate the mechanism by which a thermochromic compound produces a color change due to external heat.

Figure 7 shows the L*a*b* color space.

Figure 8 shows a picture before the color change of the bezel layer in accordance with a preferred embodiment of the present invention.

Figure 9 shows a picture after the color change of the bezel layer in accordance with a preferred embodiment of the present invention.

The various objects, features and advantages of the present invention will become more <RTIgt; In the drawings, the same component symbols are used to indicate the same or similar components, and the redundancy is omitted. Long narrative. Furthermore, in the following description, the words "first", "second", "one side", "the other side" and the like are used to distinguish a particular element from other elements, but the structure of such elements should not be Limited by these words. Further, in the description of the present invention, the detailed description of the prior art will be omitted when the detailed description of the prior art will obscure the gist of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail in conjunction with the drawings.

1 is a cross-sectional view of a window substrate according to a preferred embodiment of the present invention, the window substrate including a bezel layer 20. 2 is a cross-sectional view of a touch sensor in accordance with a preferred embodiment of the present invention. Figure 3 is a cross-sectional view of a touch sensor in accordance with another preferred embodiment of the present invention. 4 is a cross-sectional view of a touch sensor in accordance with still another preferred embodiment of the present invention.

The touch sensor according to the preferred embodiment of the present invention may include a window substrate 10 and a bezel layer 20. The bezel layer 20 is formed along a periphery of the window substrate 10. Wherein, the bezel layer 20 comprises a photochromic compound exhibiting at least two colors or a thermochromic compound exhibiting at least two colors.

The touch sensor of the present invention can be implemented by various structures including the window substrate 10, and is not limited to any particular touch sensor, and can be changed without departing from the spirit and scope of the present invention.

For example, as shown in FIG. 2, the electrode pattern 30 can be directly formed on the window substrate 10, and the window substrate 10 generally refers to a window type (window). Integrated type). The bezel layer 20 can be formed along a periphery, and the periphery is located on the window substrate 10. The electrode pattern 30 may be formed in the bezel layer 20, and the bezel layer 20 is located on the window substrate 10. Herein, the electrode pattern 30 can be a single layer of the electrode pattern 30, and as shown in FIG. 4, an internal capacitive type touch sensor (intercapacitive typed touch sensor) can be realized through the individual base substrate 10a. The touch sensor includes a first electrode pattern 31 and a second electrode pattern 32.

In addition, as shown in FIG. 3, in the touch sensor, the first electrode pattern 31 and the second electrode pattern 32 are respectively formed on two surfaces of the base substrate 10a, and are electrically connected to the respective electrode patterns. The first electrode wiring 31a and the second electrode wiring 32a of 30. In order to protect the first electrode pattern 31 exposed on the base substrate 10a and to provide visibility of the electrode wiring 30a, the window substrate 10 having the printed bezel layer 20 may be coupled to the substrate by a transparent adhesive layer 40. On the substrate 10a.

The window substrate 10 or the base substrate 10a can be made of the same material as the other. When considering that the window substrate 10 functions as a protective layer, the window substrate is preferably made of tempered glass and the like. Further, the material constituting the base substrate 10a is not particularly limited as long as it is a material having a predetermined strength or higher strength, and the material may include polyethylene terephthalate (PET) or polycarbonate ( Polycarbonate (PM), polymethylmethacrylate (PMMA), polyethylenenaphthalate (PEN), polyethersulfone (polyethersulfone) PES), cyclic olefin copolymer (COC), triacetyl cellulose (TAC) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, poly Made of polystyrene (PS), biaxially oriented polystyrene (BOPS) (containing K resin), glass or tempered glass, and the like, and can be treated by primer (primer) Treatment) or the like is combined with the electrode pattern 30. In addition, various materials may be selected in a range that does not block the visibility of the touch sensor, for example, the base substrate may be formed as an insulating layer.

The electrode pattern 30 allows the controller (not shown in the drawing) to recognize the coordinates of the touch by means of a touch input. The electrode pattern 30 can be formed by using copper (cop), aluminum (aluminum, Al), gold (gold), silver (silver, Ag), titanium (titanium, Ti), palladium (Palladium), chromium. (chromium, Cr), nickel (nickel, Ni) or a combination thereof is formed, and one or more electrode patterns may be stacked. In addition to the above metals, the electrode pattern 30 may be made of a metal oxide (for example, metallic silver formed by exposing/developing a silver salt emulsion layer), indium tin oxide (ITO), or using a conductive polymer. The conductive polymer is, for example, polyethylene dioxythiophene (PEDOT) / polysulfonated styrene (PSS) which is flexible and easy to coat. It should be apparent to those skilled in the art that various materials having electrical conductivity that do not block the visibility of the electrode pattern 30 can be selected and applied.

In the present invention, the bezel layer 20 formed on the window substrate 10 comprises a photochromic compound or a thermochromic compound, and the photochromic compound and the thermochromic compound may be changed into two or more colors. In particular, the face layer 20 The color change is displayed by a predetermined range of heat or light, thereby providing various functional technical features.

In particular, in the case of a photochromic compound, the photochromic compound is changed in color by light, exposure index, and the like, and ultraviolet rays which may be harmful to the human body are manifested in various portable devices ( Including the touch sensor, the user is provided with a warning function, and various colors of the bezel layer 20 are realized, thereby adding functional features and effectively performing aesthetic features. Further, in the case of the thermochromic compound, the thermochromic compound undergoes a color change by a transition temperature range, and various colors can be realized in a high temperature region or a low temperature region, so that the measurement can be performed immediately The optimized environment of the device (including the touch sensor) used, and the heat generation of the device (including the touch sensor) itself can be inspected, so that the risk of the product can be prevented in advance, and the risk of the product includes damage, Explosion, and the like.

Moreover, the heat generation by the operation of the touch sensor or the color change according to the indoor and outdoor temperature changes can provide the functional advantages and color realization of the bezel layer 20 suitable for the surrounding environment, and can enhance the value of the product. .

Hereinafter, the types of the photochromic compound and the thermochromic compound to be added and the effects of the respective materials will be described, and the respective preparations for effectively performing the function of the bezel layer 20 by using the respective materials for the touch sensor will be described. The method does not hinder the operational performance or function of the touch sensor.

First, a photochromic compound can change its color by a change in chemical structure upon exposure to visible light, infrared light, or ultraviolet light. especially, The color of the photochromic compound is changed by ultraviolet light to provide an alert function to the environment outside the user, and whether or not it is exposed to light, the color change of the bezel layer 20 is naturally realized, thereby changing more effectively. The color of the border layer 20 is to provide a beautiful aesthetic. In particular, the controller of the device (including the touch sensor) is coupled to an indicator that is indicative of the risk of exposure to ultraviolet light, thereby allowing an external user to recognize a change in color under a warning or other vibration function.

The photochromic compound may be selected from the group consisting of triarylmethane, stilbene, azastilbene, nitrone, fulgide, and spiro ratio. At least one of the group consisting of spiropyran, naphthopyran, spiro-naphthoxazine, and spiro-oxazine.

In particular, the photochromic compound may be selected from the group consisting of {spiro(2H-2,3-(3H)naphthalene(2,1-b)(1,4)oxazine)-1,3-dihydro-1,3 ,3-trimethyl-6'-(1-piperidinyl)}({spiro(2H-2,3-(3H)naphtha(2,1-b)(1,4)oxazine)-1,3 -dihydro-1,3,3-trimethyl-6'-(1-piperidinyl)}), {1,3-dihydro-1,3,3-trimethyl-6'-(2,3-dihydrogen -1H-吲哚-1-yl) snail [2H-吲哚-2,8'-[3H]naphtho[2,1-b][1,4]oxazine}({1,3-dihydro- 1,3,3-trimethyl-6'-(2,3-dihydro-1H-indole-1-yl)spiro[2H-indole-2,8'-[3H]naphto[2,1-b][1 , 4]oxazine}), and {3,3-diphenyl-3H-naphtho(2,1-b)pyran}({3,3-diphenyl-3H-naphto(2,1-b)pyran }) At least one of the group consisting of.

For example, a photochromic compound of purple photochromic (CAS number: 114747-45-4) whose general chemical product name is {Spiro(2H-2,3-(3H)naphtho[2,1- b) (1,4)oxazine)-1,3-dihydro-1,3,3-trimethyl-6'-(1-piperidinyl)} ({spiro(2H-2,3-( 3H)naphtha(2,1-b)(1,4)oxazine)-1,3-dihydro-1,3,3-trimethyl-6'-(1-piperidinyl)}), when exposed to sunlight, this The photochromic compound has a discolor of purple.

The general chemical product name is {1,3-dihydro-1,3,3-trimethyl-6'-(2,3-dihydro-1H-indol-1-yl) snail [2h-吲哚-2,8'-[3H]naphtho[2,1-b][1,4]oxazine}({1,3-dihydro-1,3,3-trimethyl-6'-(2,3- a blue photochromic substance of dihydro-1H-indole-1-yl)spiro[2h-indole-2,8'-[3H]naphto[2,1-b][1,4]oxazine}) An example of a color-changing compound that discolors to a blue color when exposed to sunlight.

The general chemical product name is {3,3-diphenyl-3H-naphtho(2,1-b)pyran}({3,3-Diphenyl-3H-naphto(2,1-b)pyran}) The yellow photochromic substance is an example of a photochromic compound (CAS No. 4222-20-2) which is discolored to yellow when exposed to sunlight.

It can be confirmed that other colors (i.e., red, pink, orange, and the like) are discolored by the irradiation of light.

Further, the thermochromic compound is a compound capable of realizing various colors in accordance with an external temperature range. In the example where the thermochromic compound receives thermal energy and exceeds the transition temperature, its molecular structure is altered, and an electron is supplied. The compound and an electron accepting compound react with each other to form a scattering domain. Therefore, the incident electromagnetic radiation is reflected in a dispersion region to exhibit a reflection characteristic in a specific wavelength band, and thus the color system is changed. Prior to the molecular structure formation reaction described above, electromagnetic radiation is transmitted to reveal a transparent color. However, after the formation of the dispersion zone, the color can be expressed by the above reflection.

As shown in Fig. 5, the electron-donating compound A and the electron-accepting compound B are separated from each other and each exist separately. Further, when heat is applied, the electron-donating compound and the electron-accepting compound are coupled to each other to be changed to the compound C, and the compound C has a new structure, so that a dispersion region can be formed to develop a color. As shown in Figure 6, the compound has a transparent zone that directly transmits light prior to the reaction. However, after the reaction, the compound has a region in which the light system is reflected and dispersed to achieve various colors.

The thermochromic compound may be selected from the group consisting of spirolactone, fluoran, spiropyran, fulgide, bisphenol A, paraben ( At least one of a group consisting of paraben), 1,2,3-triazol derivate, and 4-hydroxycoumarin.

In particular, the thermochromic compound may be composed of an electron-donating compound and an electron-accepting compound, wherein the electron-donating compound may be selected from 3,6-dimethoxyfluorane, 3- 3-cyclohexylamino-6-chlorofluorane, 3-diethylanilinofluoran (3-diethylaminobenfluorane), rhodamine B lactone, crystal violet lactone, 3-diethylamino-7-dibenzylaminofluorane And at least one of the group consisting of 3-diethylamino-6-methyl-aminofluorane. Further, the electron-accepting compound may be selected from N-octyl alcohol, N-decyl alcohol, N-lauryl alcohol, and N-myristyl alcohol. At least one of the group consisting of N-cetyl alcohol and N-stearyl alcohol.

Table 1 above shows the compounds that supply electrons, and Table 2 above shows the compounds that accept electrons.

As shown in Tables 1 and 2, the various colors provided by the electron-donating compound and the electron-accepting compounds coupled to the electron-donating compound are combined with each other at the time of color change (ie, Various colors and various temperature systems are combined with each other), so that various temperature ranges and colors can be easily realized.

Referring to Tables 1 and 2, the thermochromic compound may cause a change in color in the range of -5 ° C to 80 ° C, and the interval of color change may be about 3 ° C.

The thermochromic compound is a sensitive material, and the sensitive material is affected by the external environment. Therefore, the thermochromic compound has a microcapsule shape, and the microcapsule shape can serve as a protective film to provide a protective function. The microcapsules may contain a compound supplying electrons and a compound receiving electrons therein, and the exterior of the microcapsule may be coated with a thermosetting resin. Herein, the thermosetting resin may be selected from the group consisting of a polyester resin, a polyurethane resin, a melamine resin, an epoxy resin, and a diallyl phthalate resin. ), and among vinyl ester resins missing one. The microcapsules may have a diameter of from 1 micrometer (μm) to 50 micrometers, and preferably from 3 micrometers to 15 micrometers.

The frame layer 20 contains a photochromic compound and a thermochromic compound capable of realizing two or more kinds of colors, and is not satisfied with various temperature ranges for light or heat, photochromic compounds and heat-induced The color changing compound may be present in a transparent state. Therefore, in order to maintain the existing function of the bezel layer 20 and achieve color, titanium dioxide (TiO ₂ ) paste is mixed with a photochromic compound or a thermochromic compound, and the titanium dioxide paste is used to realize a white border. The layer, therefore, the white bezel layer 20 can be realized even if the photochromic compound or the thermochromic compound is not in the external condition of the range in which the reaction is carried out.

Herein, although the titanium oxide is exemplified in the experimental examples, it is selected from other aluminum oxide (Al ₂ O ₃ ), magnesium oxide (MgO), sodium oxide (Na ₂ O). , lithium oxide (Li ₂ O), beryllium oxide (BeO), silicon oxide (SiO ₂ ), magnesium sulfide (MgS), magnesium fluoride (MgF2), magnesium carbonate ( MgCO ₃ ), zinc oxide (ZnO), zinc sulfide (ZnS), potassium nitrate (KNO ₃ ), potassium chloride (KCl), potassium hydroxide (KOH), gallium trioxide (Ga ₂ O ₃ ), chlorination Any of RbCl, RbF, BaTiO ₃ , BaSO ₄ , BaCl ₂ , and the like, or various combinations thereof, may be associated with light The color-changing compound or the thermochromic compound is mixed to realize the technical features of the present invention.

The bezel layer 20 can be formed by mixing a photochromic compound or a thermochromic compound with a titania (TiO ₂ ) dope.

In particular, the bezel layer 20 may comprise from 10 weight percent (wt%) to 70 weight percent of the photochromic compound or thermochromic compound, and from 30 weight percent to 90 weight percent titanium oxide (TiO) in the respective dope form. ₂ ) a paste, and preferably, the bezel layer 20 may comprise from 30 weight percent to 50 weight percent of the photochromic compound or thermochromic compound, and from 50 weight percent to 70 weight percent of the titanium dioxide cement in the form of the paste. .

In the example in which the titanate oxide (TiO ₂ ) cement constitutes the bezel layer 20, it is mixed with a photochromic compound or a thermochromic compound, and contains 10% by weight or less of a photochromic compound or a heat-induced compound. In the case of a color-changing compound, there is a problem that the discoloration range of the color-changing compound is limited due to the white titanate oxide (TiO ₂ ) of the bezel layer 20. Also, when 70% by weight or more of the photochromic compound or thermochromic compound is contained, the mixing property and the dispensability with respect to the titanate oxide paste for forming the bezel layer 20 may be affected. Deterioration, and adhesion may be significantly deteriorated when the transparent adhesive layer of the touch sensor is bonded. Therefore, it is appropriate that the bezel composition can be mixed with the photochromic compound or the thermochromic compound in the above range in the form of a dope.

Figs. 8 and 9 show pictures of experimental results in which the color changes in accordance with the case where the material constituting the white frame of the bezel layer 20 is mixed with the thermochromic compound in a predetermined ratio.

First, in this experiment, a thermochromic compound which undergoes a color change at 45 ° C was used, and red and blue were provided as representative colors. Individual display The percentages (%) in Figures 8 and 9 represent weight percentages (wt%), and the pre-values indicate the total content of the compound constituting the white frame and the weight percentage of the thermochromic compound.

Figure 8 shows the color of each of the bezel layers 20 in the heating plate at a temperature of 45 ° C or higher. It can be understood that the thermochromic compound used in this experiment changed color at 45 ° C. Therefore, in other ranges, the compound was transparent and showed white color due to the mixed white border component.

Figure 9 shows the color in the case of satisfying the transition temperature of the thermochromic compound.

Table 4

Table 3 shows the color coding changed to red according to mixing with the thermochromic compound, and Table 4 shows the color coding changed to blue according to mixing with the thermochromic compound.

Referring to Tables 3, 4, and 9, in the case of a thermochromic compound having a predetermined ratio or higher, the compound has a rubber-like material, thereby affecting the reliability of the touch sensor, including The problem of adhesion to the transparent adhesive layer of the touch sensor, and in the case of containing less than 10% by weight of the thermochromic compound, the color developed by the thermochromic compound itself cannot be obtained by the color of the mixed white border To effectively display the problem. Therefore, when mixed with the white frame component, it is preferably contained in the range of at least 10% by weight to 70% by weight of the thermochromic compound, more preferably 30% by weight to 50% by weight. A color changing compound. In this case, the 3-diethylanilinofluoran of the thermochromic compound is shown as red, and the crystal violet lactone is shown as blue, and n-hexadecanol having a transition temperature of 45 ° C As an electron accepting compound, the above compounds were combined with each other to carry out an experiment.

The colors L*, a*, and b* representing the colors in Tables 3 and 4 are based on the color system of Fig. 7. The L*a*b* color system (see Figure 7) is used to indicate work Color errors and small color differences in pigments, coatings, paper, plastics, fabrics, and the like in the industry. The color system is the result obtained by conducting the research in order to approach human sensitivity. The color system is based on the yellow-to-blue and green-to-red opportunity-color theory and can be sensed by humans. It was defined by the International Commission on Illumination (CIE) in various color spaces in 1976. One. In the L*a*b* color system, L* represents brightness, and a* and b* represent color directions as indicated by the coordinates of Fig. 7. That is, +a* indicates the direction of red, -a* indicates the direction of green, +b* indicates the direction of yellow, and -b* indicates the direction of blue. The middle portion is colorless, and as the values of a* and b* increase, the chromaticity system also increases from the center to the outside. When the colors are mixed by the characteristics of the color system, the color error can be significantly displayed, and the direction of color change can be easily predicted, which is widely used throughout the world.

In the case of the photochromic compound, the same result as described above can be used, so that the frame layer 20 of the touch sensor contains a compound, and in order to easily realize various colors, the mixing ratio of the glue components of the white frame can be adjusted. Therefore, it is possible to achieve a more optimal color, and may not cause negative effects on the operation and reliability of the touch sensor.

According to the present invention, the bezel layer of the touch sensor can use a photochromic compound or a thermochromic compound, thereby enabling various colors of the bezel member to be realized according to external stimuli.

In addition, a photochromic compound can be added to the bezel layer so that exposure to ultraviolet light or similar light in sunlight can be sensed to pre- Prevent the risk of skin or other physical hazards caused by UV rays.

Moreover, due to the addition of the photochromic compound, the color change of the photochromic compound and other light rays including ultraviolet rays are provided as numerical values and data, and act on the control processor of the device (including the touch sensor) to perform the function. (For example, the warning function for the exposure risk of ultraviolet rays, and the like).

In addition, the color change of the photochromic compound and the time during which the changed color can be maintained can be adjusted to more effectively prevent the risk of exposure to ultraviolet light.

Moreover, the thermochromic compound can be added to the bezel layer, so that in addition to the external temperature, the risk caused by the heat generation or the like in the touch sensor is previously displayed as the color of the bezel layer, thereby preventing the occurrence of fear. The risk of the user of the touch sensor and provides a more improved reliability associated with the heat generation of the product.

In addition, the temperature at a specific location, indoors and outdoors can be measured and confirmed instantaneously as the thermochromic compound changes color according to high temperature or low temperature.

Further, the photochromic compound or the thermochromic compound is a transparent material (when subjected to an external stimulus of a subcritical value or lower), and the photochromic compound or the thermochromic compound is It is mixed with the material of the bezel layer (having an existing color), so it can provide a stable function (which can shield the electrode wiring and the like), and realize more colors of the bezel layer.

In addition, a suitable temperature range can be applied and selected according to the color of the photochromic compound, thereby enabling the warning function regarding temperature change to be applied to devices in various fields other than mobile phones (including touch sensors). application.

While the embodiments of the present invention have been disclosed, it should be understood that the invention is not limited to the embodiments described above. A person skilled in the art can make various modifications, additions and substitutions without departing from the spirit and scope of the invention.

Accordingly, any and all modifications, changes, and equivalents are intended to be within the scope of the invention, and the scope of the invention is defined by the scope of the appended claims.

10‧‧‧Window type substrate

20‧‧‧Border layer

Claims (16)

A touch sensor includes: a window substrate; and a frame layer formed along a periphery, the periphery being located on the window substrate, wherein the frame layer comprises a light A photochromic compound or a thermochromic compound, the photochromic compound or the thermochromic compound exhibiting at least 2 colors. The touch sensor of claim 1, wherein the photochromic compound is selected from the group consisting of triarylmethane, stilbene, and azastilbene. , nitrone, fulgide, spiropyran, naphthopyran, spiro-naphthoxazine, and spiro-oxazine At least one of the group consisting of. The touch sensor of claim 1, wherein the photochromic compound is selected from the group consisting of {2H-2,3-(3H)naphthalene (2,1-b) (1,4). Pyridinium-1,3-dihydro-1,3,3-trimethyl-6'-(1-piperidinyl)}({spiro(2H-2,3-(3H)naphtha(2,1- b) (1,4)oxazine)-1,3-dihydro-1,3,3-trimethyl-6'-(1-piperidinyl)}), {1,3-dihydro-1,3,3-three Methyl-6'-(2,3-dihydro-1H-indol-1-yl)spiro[2H-吲哚-2,8'-[3H]naphtho[2,1-b][1, 4]oxazine}({1,3-dihydro-1,3,3-trimethyl-6'-(2,3-dihydro-1H-indole-1-yl)spiro[2H-indole-2,8'- [3H]naphto[2,1-b][1,4]oxazine}), and {3,3-diphenyl-3H-naphtho(2,1-b)pyran}({3,3- diphenyl-3H-naphto(2,1-b)pyran}) At least one of the group consisting of. The touch sensor of claim 1, wherein the bezel layer is formed by mixing the photochromic compound or the thermochromic compound with titanium dioxide (TiO ₂ ) cement. The touch sensor of claim 3, wherein the bezel layer comprises 10% by weight (% by weight) to 70% by weight of the photochromic compound or the thermochromic compound, and 30% by weight to 90% A weight percentage of titanium dioxide (TiO ₂ ) cement, the photochromic compound or the thermochromic compound is in a gel form. The touch sensor of claim 4, wherein the bezel layer comprises 30% by weight to 50% by weight of the photochromic compound or the thermochromic compound, and 50% by weight to 70% by weight of titanium dioxide. (TiO ₂ ) a cement, the photochromic compound or the thermochromic compound in a gel form. The touch sensor of claim 1, wherein the photochromic compound is photochromic due to a change in chemical structure of the photochromic compound when exposed to visible light, infrared light, or ultraviolet light. The compound has a color change. The touch sensor of claim 1, wherein the thermochromic compound is externally applied with heat, and the thermochromic compound has a color change due to a change in chemical structure of the thermochromic compound. The touch sensor of claim 1, wherein the thermal sensor The coloring compound is selected from the group consisting of spirolactone, fluoran, spiropyran, fulgide, bisphenol A, paraben, At least one of the group consisting of 1,2,3-triazol derivate, and 4-hydroxycoumarin. The touch sensor of claim 1, wherein the thermochromic compound comprises an electron donating compound and an electron accepting compound. The touch sensor of claim 10, wherein the electron-donating compound is selected from the group consisting of 3,6-dimethoxyfluorane, 3-cyclohexylamino-6 3-cyclohexylamino-6-chlorofluorane, 3-diethylaminobenfluorane, rhodamine B lactone, crystal violet lactone, 3 3-diethylamino-7-dibenzylaminofluorane, and 3-diethylamino-6-methyl-aminofluorane At least one of the group consisting of; and the electron-accepting compound is selected from the group consisting of N-octyl alcohol, N-decyl alcohol, and n-lauryl. At least one of a group consisting of alcohol, N-myristyl alcohol, N-cetyl alcohol, and N-stearyl alcohol. The touch sensor of claim 1, wherein the thermochromic compound has a shape of a microcapsule having a microcapsule of from 1 micrometer to 50 micrometers. diameter of. The touch sensor of claim 12, wherein the microcapsule has a diameter of from 3 micrometers to 15 micrometers. The touch sensor of claim 10, wherein the electron-donating compound and the electron-accepting compound are provided in an inner portion of a microcapsule, and an outer portion of the microcapsule is Covered with thermosetting resin. The touch sensor of claim 14, wherein the thermosetting resin is selected from the group consisting of a polyester resin, a polyurethane resin, a melamine resin, and an epoxy resin. At least one of a resin, a diallyl phthalate resin, and a vinylester resin. The touch sensor of claim 1, further comprising: a plurality of electrode patterns formed between the frame layers, and the electrode patterns are formed on the window substrate, To identify a user's touch coordinates; and a plurality of electrode wires, the electrode wires are formed on the frame layer to be electrically connected to the electrode patterns.